package com.itheima.service.store.impl;

import com.github.pagehelper.PageHelper;
import com.github.pagehelper.PageInfo;
import com.itheima.dao.store.QuestionDao;
import com.itheima.domain.store.Question;
import com.itheima.factory.MapperFactory;
import com.itheima.service.store.QuestionService;
import com.itheima.utils.UUIDUtil;
import org.apache.ibatis.session.SqlSession;
import org.apache.poi.ss.usermodel.*;
import org.apache.poi.ss.util.CellRangeAddress;
import org.apache.poi.xssf.usermodel.XSSFWorkbook;

import java.io.ByteArrayOutputStream;
import java.util.ArrayList;
import java.util.Date;
import java.util.List;
import java.util.Random;

/**
 * 题库管理  -> 题目管理(业务层)
 */

public class QuestionServiceImpl implements QuestionService {

    @Override
    public PageInfo<Question> queryPage(Integer pageNum, Integer pageSize) throws Exception {
        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        PageHelper.startPage(pageNum,pageSize);
        List<Question> list = questionDao.findAll();
        PageInfo<Question> pageInfo = (PageInfo<Question>) new PageInfo<>(list);

        sqlSession.close();
        return pageInfo;
    }

    @Override
    public List<Question> findAll() throws Exception {

        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        List<Question> list = questionDao.findAll();

        sqlSession.close();

        return list;
    }

    @Override
    public Question findById(String id) throws Exception {
        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        Question question = questionDao.findById(id);

        sqlSession.close();

        return question;
    }

    @Override
    public void save(Question question) throws Exception {

        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        question.setId(UUIDUtil.getSimpleUUID());
        question.setCreateTime(new Date());//设置插入日期
        question.setReviewStatus("0");//设置审核状态为未审核


        questionDao.save(question);

        sqlSession.commit();
        sqlSession.close();


    }

    @Override
    public void deleteById(String... ids) throws Exception {

        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        for (String id : ids) {
            questionDao.deleteById(id);
        }

        sqlSession.commit();
        sqlSession.close();

    }

    @Override
    public void update(Question question) throws Exception {
        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);

        //TODO 设置上传的图片名字
        questionDao.update(question);

        sqlSession.commit();
        sqlSession.close();
    }

    @Override
    public ByteArrayOutputStream report() throws Exception {
        /*1.从数据库查询所有问题列表*/
        List<Question> questionList=this.findAll();

        /*2.将查询到的数据写入内存中*/
        XSSFWorkbook wb = new XSSFWorkbook();
        Sheet s = wb.createSheet("题目数据文件");

        //设置通用配置
        //s.setColumnWidth(4,100);
        CellStyle cs_field = wb.createCellStyle();
        cs_field.setAlignment(HorizontalAlignment.CENTER);
        cs_field.setBorderTop(BorderStyle.THIN);
        cs_field.setBorderBottom(BorderStyle.THIN);
        cs_field.setBorderLeft(BorderStyle.THIN);
        cs_field.setBorderRight(BorderStyle.THIN);

        //制作标题
        s.addMergedRegion(new CellRangeAddress(1,1,1,12));

        Row row_1 = s.createRow(1);
        Cell cell_1_1 = row_1.createCell(1);
        cell_1_1.setCellValue("在线试题导出信息");
        //创建一个样式
        CellStyle cs_title = wb.createCellStyle();
        cs_title.setAlignment(HorizontalAlignment.CENTER);
        cs_title.setVerticalAlignment(VerticalAlignment.CENTER);
        cell_1_1.setCellStyle(cs_title);

        //制作表头
        String[] fields = {"题目ID","所属公司ID","所属目录ID","题目简介","题干描述",
                "题干配图","题目分析","题目类型","题目难度","是否经典题","题目状态","审核状态"};
        Row row_2 = s.createRow(2);

        for (int i = 0; i < fields.length; i++) {
            Cell cell_2_temp = row_2.createCell(1 + i); //++
            cell_2_temp.setCellValue(fields[i]);    //++
            cell_2_temp.setCellStyle(cs_field);
        }

        //制作数据区
        int row_index = 0;
        for (Question q : questionList) {
            int cell_index = 0;
            Row row_temp = s.createRow(3 + row_index++);

            Cell cell_data_1 = row_temp.createCell(1 + cell_index++);
            cell_data_1.setCellValue(q.getId());    //++
            cell_data_1.setCellStyle(cs_field);

            Cell cell_data_2 = row_temp.createCell(1 + cell_index++);
            cell_data_2.setCellValue(q.getCompanyId());    //++
            cell_data_2.setCellStyle(cs_field);

            Cell cell_data_3 = row_temp.createCell(1 + cell_index++);
            cell_data_3.setCellValue(q.getCatalogId());    //++
            cell_data_3.setCellStyle(cs_field);

            Cell cell_data_4 = row_temp.createCell(1 + cell_index++);
            cell_data_4.setCellValue(q.getRemark());    //++
            cell_data_4.setCellStyle(cs_field);

            Cell cell_data_5 = row_temp.createCell(1 + cell_index++);
            cell_data_5.setCellValue(q.getSubject());    //++
            cell_data_5.setCellStyle(cs_field);

            Cell cell_data_6 = row_temp.createCell(1 + cell_index++);
            cell_data_6.setCellValue(q.getPicture());    //++
            cell_data_6.setCellStyle(cs_field);

            Cell cell_data_7 = row_temp.createCell(1 + cell_index++);
            cell_data_7.setCellValue(q.getAnalysis());    //++
            cell_data_7.setCellStyle(cs_field);

            Cell cell_data_8 = row_temp.createCell(1 + cell_index++);
            cell_data_8.setCellValue(q.getType());    //++
            cell_data_8.setCellStyle(cs_field);

            Cell cell_data_9 = row_temp.createCell(1 + cell_index++);
            cell_data_9.setCellValue(q.getDifficulty());    //++
            cell_data_9.setCellStyle(cs_field);

            Cell cell_data_10 = row_temp.createCell(1 + cell_index++);
            cell_data_10.setCellValue(q.getIsClassic());    //++
            cell_data_10.setCellStyle(cs_field);

            Cell cell_data_11 = row_temp.createCell(1 + cell_index++);
            cell_data_11.setCellValue(q.getState());    //++
            cell_data_11.setCellStyle(cs_field);

            Cell cell_data_12 = row_temp.createCell(1 + cell_index++);
            cell_data_12.setCellValue(q.getReviewStatus());    //++
            cell_data_12.setCellStyle(cs_field);
        }

        //将内存中的workbook数据写入到流中
        ByteArrayOutputStream os = new ByteArrayOutputStream();
        wb.write(os);
        wb.close();

        return os;
    }

    @Override
    public List<Question> textPaper() throws Exception {
        SqlSession sqlSession = MapperFactory.getSqlSession();
        QuestionDao questionDao = sqlSession.getMapper(QuestionDao.class);
        Random r = new Random();
        List<Question> questions = new ArrayList<>();
        //获取单选题
        List<Question> singleQuestions = questionDao.findSingleQuestion();
        for (int i = 0; i < 2; i++) {
            Question question = singleQuestions.get(r.nextInt(singleQuestions.size()));
            questions.add(question);
        }
        //获取多选题
        List<Question> doubleQuestions = questionDao.findDoubleQuestion();
        for (int i = 0; i < 2; i++) {
            Question question = doubleQuestions.get(r.nextInt(doubleQuestions.size()));
            questions.add(question);
        }
        sqlSession.close();
        return questions;
    }



}

